Update README.md Yaml file snippet

Users unfamiliar with GitHub actions just copy the pipeline snippets and wonder why the analysis does not trigger. Let's make sure it does by adding "main" and "develop" branch names by default.

README.md

@@ -28,11 +28,13 @@ The workflow YAML file will usually look something like this:
 
 ```yaml
 on:
-  # Trigger analysis when pushing in master or pull requests, and when creating
-  # a pull request. 
+  # Trigger analysis when pushing to your main branches, and when creating a pull request.
   push:
     branches:
+      - main
       - master
+      - develop
+      - 'releases/**'
   pull_request:
       types: [opened, synchronize, reopened]